diff --git a/Libraries/LibWeb/WebGL/WebGL2RenderingContextBase.idl b/Libraries/LibWeb/WebGL/WebGL2RenderingContextBase.idl
index be1b583442c..2d934e4c0a1 100644
--- a/Libraries/LibWeb/WebGL/WebGL2RenderingContextBase.idl
+++ b/Libraries/LibWeb/WebGL/WebGL2RenderingContextBase.idl
@@ -314,7 +314,7 @@ interface mixin WebGL2RenderingContextBase {
     // May throw DOMException
     [FIXME] undefined texImage3D(GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLenum format, GLenum type, TexImageSource source);
 
-    [FIXME] undefined texImage3D(GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLenum format, GLenum type, [AllowShared] ArrayBufferView? srcData);
+    undefined texImage3D(GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLenum format, GLenum type, [AllowShared] ArrayBufferView? srcData);
     [FIXME] undefined texImage3D(GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLenum format, GLenum type, [AllowShared] ArrayBufferView srcData, unsigned long long srcOffset);
 
     [FIXME] undefined texSubImage3D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, GLintptr pboOffset);
diff --git a/Meta/Lagom/Tools/CodeGenerators/LibWeb/GenerateWebGLRenderingContext.cpp b/Meta/Lagom/Tools/CodeGenerators/LibWeb/GenerateWebGLRenderingContext.cpp
index fdcb840227c..182be28937a 100644
--- a/Meta/Lagom/Tools/CodeGenerators/LibWeb/GenerateWebGLRenderingContext.cpp
+++ b/Meta/Lagom/Tools/CodeGenerators/LibWeb/GenerateWebGLRenderingContext.cpp
@@ -540,6 +540,25 @@ public:
             continue;
         }
 
+        if (function.name == "texImage3D"sv) {
+            // FIXME: If a WebGLBuffer is bound to the PIXEL_UNPACK_BUFFER target, generates an INVALID_OPERATION error.
+            // FIXME: If srcData is null, a buffer of sufficient size initialized to 0 is passed.
+            // FIXME: If type is specified as FLOAT_32_UNSIGNED_INT_24_8_REV, srcData must be null; otherwise, generates an INVALID_OPERATION error.
+            // FIXME: If srcData is non-null, the type of srcData must match the type according to the above table; otherwise, generate an INVALID_OPERATION error.
+            // FIXME: If an attempt is made to call this function with no WebGLTexture bound (see above), generates an INVALID_OPERATION error.
+            // FIXME: If there's not enough data in srcData starting at srcOffset, generate INVALID_OPERATION.
+            function_impl_generator.append(R"~~~(
+    void const* src_data_ptr = nullptr;
+    if (src_data) {
+        auto const& viewed_array_buffer = src_data->viewed_array_buffer();
+        auto const& byte_buffer = viewed_array_buffer->buffer();
+        src_data_ptr = byte_buffer.data();
+    }
+    glTexImage3D(target, level, internalformat, width, height, depth, border, format, type, src_data_ptr);
+)~~~");
+            continue;
+        }
+
         if (function.name == "texImage2D"sv && function.overload_index == 1) {
             // FIXME: If this function is called with an ImageData whose data attribute has been neutered,
             //        an INVALID_VALUE error is generated.